Comments on Design with Microcontrollers: Simple PWM DC motor control using MOSFET H-Bridge ...

can you send me the .hex file by posting it as a c...

2012-01-07T21:54:31.825-08:00

can you send me the .hex file by posting it as a comment on my website..www.imsuyash.in

please include a project on stepper motors

2011-12-21T23:44:12.587-08:00

please include a project on stepper motors

hello. could you send the .hex file gytisq@gmail....

2011-11-14T12:17:34.617-08:00

hello. could you send the .hex file

gytisq@gmail.com

can i use potentiometer to rate the speed and a ha...

2011-10-13T14:03:23.319-07:00

can i use potentiometer to rate the speed and a hall effect device to sense the speed from potentiometer instead of s2 & s3 speed increase and decrease buttons.
in this project what are the c1 & c2,
or any other suggestions
reply ASAP
thanks

this project is good but can i do the same using P...

2011-10-13T13:44:46.032-07:00

this project is good
but can i do the same using PIC micro controller.
if it can be used then what changes i have to make in this with respect to devices ,
(i.e) is it possible to just replace the existing Micro controller with PIC and
give me your suggestions as i have to complete it in 3 weeks.

ummm guys i dnt knw anything abt all these stuff b...

2011-09-16T09:26:14.769-07:00

ummm guys i dnt knw anything abt all these stuff but damn intrstd in these sot of things so can any one give a simple project which i would to strt plzzzz guys help me

Hi there, This is great! it's exactly what I w...

2011-08-29T19:24:52.625-07:00

Hi there,
This is great! it's exactly what I was looking for. Just a quick question, in your code, the header files that you have included in the source code are not present in the download link, just wondering if those header files are ones you have created personally or did you use built in ones.
I am getting several undefined variable errors and I think it is because of the declaration of variables within your header files that you have included.
If possible would you be able to put up those .h files as well?

Regards,
ECE group 17

Hi, Im building a PWM motor control unit with H- B...

2011-08-07T06:29:28.475-07:00

Hi,
Im building a PWM motor control unit with H- Bridge using ATMEGA32. I saw your programming and have got some doubt. It would be greatful if you clear it.
1.What is the need for assigning the values to TCNT1, ICR1, OCR1 and how do you specify the value.
I need to generate a pwm of 20 khz and 5volts, So what values should I substitute in TCNT1, ICR1, OCR1. Please help.

plz write the equation that relates PWM time perio...

2011-07-06T12:41:57.574-07:00

plz write the equation that relates PWM time period and motor specification to calculate the corresponding speed.

Excellent project, saved me on time, thanks for sh...

2011-06-22T23:46:29.397-07:00

Excellent project, saved me on time, thanks for sharing, keep going....

Hi Mostafa, ideally, the H-bridge is supposed to ...

2011-05-29T02:17:11.264-07:00

Hi Mostafa,

ideally, the H-bridge is supposed to have upper mosfets as pmos, for higher efficiency. An H-bridge with all mosfets as nmos will need another bootstrap bias arrangement which feeds supply between upper and lower mosfets. You can refer to the datasheet of HIP4081, which is a motor driver and drives an H-bridge with all four mosfets as nmos.

If we don't add such extra circuit, we have to deal with loss of efficiency.

For better results, you can use readymade H-bridge ICs like L293, L298, which are easily available. The programming will be almost same as given here, but efficiency will be far better and also it'll reduce the wiring.

Hello, I'm Mostafa, Who posted the last comme...

2011-05-26T06:59:39.035-07:00

Hello,

I'm Mostafa, Who posted the last comment.
I have finally built the circuit myself ! See it :

http://64.191.99.143/permalink/circuit.jpg

First I bought a P-Channel MOSFET (IRF9541) , then I found that it is impossible to use the P-Channel mosfets for the purpose, so I have lost 2$ , then I bought 4 new IRFZ44N Mosfet.
Everythings are good !

I have a question :
When I connect the motor to dc source , It turns very high ! But, its most power when it is on the H-Bridge is about 1/5 of that.
Should I try to increase the (248) which you have used in your program as maximum_counter_limit ?

Thanks
Mostafa

Hello, Thank you for your project ! I am going to...

2011-05-21T22:42:59.214-07:00

Hello,

Thank you for your project !
I am going to build the project myself.
Now, I am simulation the project on Proteus.

Two questesions :
1-
The problem is here that RFD3055 is not available in Proteus library.

I am newbie to mosfets, Please can you help me to choose another mosfet models ? Just the voltage, amper of mosfets should be the same ?
I tried the 'IRHE57034' and also 'IRF6691' in circuit, but the motor is turning very slowly !

2-
I think IC1 in picture has been used to supply the ATMEGA 5v power input, can I use a regulator (12v to 5v) instead of IC1 circuit ? Please suggest a model if possible !

Thank you
Best regards
Mostafa

Hi Nate, the AVR has got in-built pull-up resistor...

2011-05-04T19:38:14.977-07:00

Hi Nate, the AVR has got in-built pull-up resistors for every port pin. They are enabled here in the program for the pins where switches are connected.

One other thing you should do is pull up all of yo...

2011-05-04T12:03:10.052-07:00

One other thing you should do is pull up all of your switches with a 10k resistor tied to the 5V line. By leaving them in a floating state when they are off you can sometimes get an erroneous signal.

Dear Sir, I'm a beginner in programming micro...

2011-04-14T08:59:26.883-07:00

Dear Sir,

I'm a beginner in programming microcontrollers. I made your motorcontrol design, but I met a few problems. After programming the microcontroller but i cannot change the direction of the motor, and it rotates only with a constant speed in the same direction even if I switch the switch. And I cannot change the speed of it.

Thanks for your reply.

I think this is a great circuit, im just learning ...

2011-03-28T18:07:18.824-07:00

I think this is a great circuit, im just learning avr so I would like to know if there is a way to change the speed control from the buttons to a 5k pot, and would i have to change the programming code?

hello sir, I try to do something like that but thi...

2010-11-26T06:30:44.698-08:00

hello sir,
I try to do something like that but this time with atmega8435.
I copied the code but I happen not turn the engine over a 4 V change I made in the program that fits with my microcontroller atmega8535 arrived yet and I do not know how I did so you could help me

Email ID:adnan_sh85@hotmail.com Thanks alot

2010-10-26T06:40:47.844-07:00

Email ID:adnan_sh85@hotmail.com

Thanks alot

@addy1985 email id?? @Roger Here th...

2010-10-25T23:46:03.273-07:00

@addy1985
email id??

@Roger
Here the in-built motor controller of the tape-recorder was disconnected, only the motor was used, so no interference.
Didn't get the second part of the question. The MOSFET h-bridge is required for direction control and also for providing higher current to the motor, which a microcontroller can't do directly. The gate is insulated, but the power consumption in mosfet is still there as high current flows from drain to source terminals.

The use of an old(?) tape recorder motor may mean ...

2010-10-24T00:17:28.881-07:00

The use of an old(?) tape recorder motor may mean there is an motorinternal speed control who may interfer with your or anybody elses designs.
Just mentioning ;-)

About Power MOSFETs and driver circuitry I guess there is no need in low switch speed apps right?
I mean, isn't the perfectly insulated gate consuming any power at all?
I guess I missed something?
/ Roger

HI!!!!! I really liked your project i'm workin...

2010-10-23T00:13:47.393-07:00

HI!!!!!
I really liked your project i'm working on it.I'm unable to find atmeg8, but i've got atmeg8L which can take voltage of 3.8 volts.What modifications do I need to make,like putting up a voltage regulator in the circuit.
Could you also help me with the Hex file.I need the .HEX file in order to burn the program.Can you please provide me with that to.
I realy appreciate the help provided.Thank you.

HI!!!!! I really liked your project i'm workin...

2010-10-23T00:13:29.910-07:00

THANK YOU for your program, but I have trouble wit...

2010-06-10T07:34:56.955-07:00

THANK YOU for your program, but I have trouble with the header: macros iom8v I did not find in avr
can you make it online for download

Hello Sir, Thank you. I have successfully build...

2010-06-06T08:29:13.832-07:00

Hello Sir,

Thank you.

I have successfully build the project now.

It will work if I place pot in place of switches?

Is it possible to drive multiple DC encoder motors with the code? or any reference link. I want to drive 5 motors with joystick.

Thanks,
Nilesh